Same issue has been going on for weeks now, download starts and the fails with a unable to download message. have tried this around 3o times, have also tried safe mode and that also fails, this is on an iMac 2017 model quite high spec machine, with ample memory and HD space, so any ideas? my MacBook pros 2021 Intel device was not a problem, strange? I'm a bit over it and having some silly quirks with my iamb as well, like turning off at random, be nice if the update worked, I'm open to suggestions here...